Self‐Templating Construction of Hollow Amorphous CoMoS4 Nanotube Array towards Efficient Hydrogen Evolution Electrocatalysis at Neutral pH

Chemistry - A European Journal - Tập 23 Số 52 - Trang 12718-12723 - 2017
Weiyi Wang1, Xiang Ren1, Shuai Hao1, Zhiang Liu2, Fengyu Xie3, Yadong Yao4, Abdullah M. Asiri5, Liang Chen6, Xuping Sun1
1College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China
2College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
3College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, Sichuan, China
4College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, Sichuan, China
5Chemistry Department and Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia
6Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, Zhejiang, China

Tóm tắt

AbstractEnvironmentally friendly electrochemical hydrogen production needs the development of earth‐abundant catalyst materials for the hydrogen evolution reaction with high activity and durability at neutral pH. In this work, the self‐templating construction of a hollow amorphous CoMoS4 nanotube array on carbon cloth (CoMoS4 NTA/CC) is reported, using hydrothermal treatment of a Co(OH)F nanowire array on CC in (NH4)2MoS4 solution. When used as a 3D electrode for hydrogen evolution electrocatalysis, the resulting CoMoS4 NTA/CC demonstrates superior catalytic activity and strong long‐term electrochemical durability in 1.0 M phosphate buffer solution (pH=7). It shows small onset overpotential of 21 mV and requires low overpotentials of 104 and 179 mV to drive geometrical current densities of 10 and 50 mA cm−2, respectively. Density functional theory calculations suggest that CoMoS4 has a more favorable hydrogen adsorption free energy than Co(OH)F.

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Chemistry - A European Journal

Tập 23 Số 52

12718-12723

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